220332731231 has 2 divisors, whose sum is σ = 220332731232. Its totient is φ = 220332731230.

The previous prime is 220332731159. The next prime is 220332731243. The reversal of 220332731231 is 132137233022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220332731231 - 2¹⁰ = 220332730207 is a prime.

It is a super-2 number, since 2×220332731231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220332731194 and 220332731203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220332731261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110166365615 + 110166365616.

It is an arithmetic number, because the mean of its divisors is an integer number (110166365616).

Almost surely, 2^220332731231 is an apocalyptic number.

220332731231 is a deficient number, since it is larger than the sum of its proper divisors (1).

220332731231 is an equidigital number, since it uses as much as digits as its factorization.

220332731231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 29.

Adding to 220332731231 its reverse (132137233022), we get a palindrome (352469964253).

The spelling of 220332731231 in words is "two hundred twenty billion, three hundred thirty-two million, seven hundred thirty-one thousand, two hundred thirty-one".